$ git clone -n https://src.fedoraproject.org/rpms/hexglass.git /var/lib/mock/f45-build-13407-450/root/chroot_tmpdir/scmroot/hexglass
Cloning into '/var/lib/mock/f45-build-13407-450/root/chroot_tmpdir/scmroot/hexglass'...
$ git fetch origin 92aa805130644bc5bfd6cb7de2af52d847d12087:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hexglass
 * [new ref]         92aa805130644bc5bfd6cb7de2af52d847d12087 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92aa805 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild