$ git clone -n https://src.fedoraproject.org/rpms/libsixel.git /var/lib/mock/f45-build-16985-494/root/chroot_tmpdir/scmroot/libsixel
Cloning into '/var/lib/mock/f45-build-16985-494/root/chroot_tmpdir/scmroot/libsixel'...
$ git fetch origin 7d745c7bdf26384bb9395259ea9b552e54dbcb0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsixel
 * [new ref]         7d745c7bdf26384bb9395259ea9b552e54dbcb0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d745c7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild