$ git clone -n https://src.fedoraproject.org/rpms/rust-allocator-api2.git /var/lib/mock/epel10.1-build-59194481-6571690/root/chroot_tmpdir/scmroot/rust-allocator-api2
Cloning into '/var/lib/mock/epel10.1-build-59194481-6571690/root/chroot_tmpdir/scmroot/rust-allocator-api2'...
$ git fetch origin 65e4ddb5261173678d960e6c8c6d1b1c5e2d6346:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-allocator-api2
 * [new ref]         65e4ddb5261173678d960e6c8c6d1b1c5e2d6346 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65e4ddb Update to version 0.2.21; Fixes RHBZ#2325153