$ git clone -n https://src.fedoraproject.org/rpms/rust-cached.git /var/lib/mock/f41-build-side-1-3006118-36735/root/chroot_tmpdir/scmroot/rust-cached
Cloning into '/var/lib/mock/f41-build-side-1-3006118-36735/root/chroot_tmpdir/scmroot/rust-cached'...
$ git fetch origin bae7c26c8932ce325d977f49d81adf166f247800:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cached
 * [new ref]         bae7c26c8932ce325d977f49d81adf166f247800 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bae7c26 Initial import; Fixes: RHBZ#2290308