$ git clone -n https://src.fedoraproject.org/rpms/yagf.git /var/lib/mock/f45-build-39195-732/root/chroot_tmpdir/scmroot/yagf
Cloning into '/var/lib/mock/f45-build-39195-732/root/chroot_tmpdir/scmroot/yagf'...
$ git fetch origin ba8debd78dcced8a05246795fdb48e12d05389b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yagf
 * [new ref]         ba8debd78dcced8a05246795fdb48e12d05389b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba8debd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild