$ git clone -n https://src.fedoraproject.org/rpms/legendary.git /var/lib/mock/f45-build-15684-478/root/chroot_tmpdir/scmroot/legendary
Cloning into '/var/lib/mock/f45-build-15684-478/root/chroot_tmpdir/scmroot/legendary'...
$ git fetch origin 248aa376a35bb63452b4e8dd6103b8fa45ca80e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/legendary
 * [new ref]         248aa376a35bb63452b4e8dd6103b8fa45ca80e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 248aa37 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild