$ git clone -n https://src.fedoraproject.org/rpms/libtatsu.git /var/lib/mock/f45-build-17068-495/root/chroot_tmpdir/scmroot/libtatsu
Cloning into '/var/lib/mock/f45-build-17068-495/root/chroot_tmpdir/scmroot/libtatsu'...
$ git fetch origin d74e267176472a18a13a762ec7a02301d7b18d82:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtatsu
 * [new ref]         d74e267176472a18a13a762ec7a02301d7b18d82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d74e267 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild