$ git clone -n https://src.fedoraproject.org/rpms/libei.git /var/lib/mock/f45-build-16124-483/root/chroot_tmpdir/scmroot/libei
Cloning into '/var/lib/mock/f45-build-16124-483/root/chroot_tmpdir/scmroot/libei'...
$ git fetch origin 9e6e44fc8e0514643d681c9ed16dc93011d01c39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libei
 * [new ref]         9e6e44fc8e0514643d681c9ed16dc93011d01c39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e6e44f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild