$ git clone -n https://src.fedoraproject.org/rpms/rust-proc-macro2.git /var/lib/mock/epel10.1-build-59195603-6571715/root/chroot_tmpdir/scmroot/rust-proc-macro2
Cloning into '/var/lib/mock/epel10.1-build-59195603-6571715/root/chroot_tmpdir/scmroot/rust-proc-macro2'...
$ git fetch origin 4ac53866e2e774cfbfa143c183326e331e2f30d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-proc-macro2
 * [new ref]         4ac53866e2e774cfbfa143c183326e331e2f30d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ac5386 Update to version 1.0.95; Fixes RHBZ#2360032