$ git clone -n https://src.fedoraproject.org/rpms/gcolor3.git /var/lib/mock/f45-build-9645-407/root/chroot_tmpdir/scmroot/gcolor3
Cloning into '/var/lib/mock/f45-build-9645-407/root/chroot_tmpdir/scmroot/gcolor3'...
$ git fetch origin a15d14cfa37fcfbfb5b3f1bf782de3fe78afbe4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gcolor3
 * [new ref]         a15d14cfa37fcfbfb5b3f1bf782de3fe78afbe4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a15d14c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild