$ git clone -n https://src.fedoraproject.org/rpms/rust-process_control.git /var/lib/mock/f41-build-side-1-3134889-39763/root/chroot_tmpdir/scmroot/rust-process_control
Cloning into '/var/lib/mock/f41-build-side-1-3134889-39763/root/chroot_tmpdir/scmroot/rust-process_control'...
$ git fetch origin 1c95b5ed579df63cd28a3dbb8a2621ee26fe451d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-process_control
 * [new ref]         1c95b5ed579df63cd28a3dbb8a2621ee26fe451d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c95b5e unused leaf package for more than two release cycles