$ git clone -n https://src.fedoraproject.org/rpms/rust-psl.git /var/lib/mock/f43-build-59195266-6571704/root/chroot_tmpdir/scmroot/rust-psl
Cloning into '/var/lib/mock/f43-build-59195266-6571704/root/chroot_tmpdir/scmroot/rust-psl'...
$ git fetch origin 4b93aa0fb45e8d263c59eaf73afe8cd59c931afa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-psl
 * [new ref]         4b93aa0fb45e8d263c59eaf73afe8cd59c931afa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b93aa0 Update to version 2.1.104; Fixes RHBZ#2347454