$ git clone -n https://src.fedoraproject.org/rpms/gtk-murrine-engine.git /var/lib/mock/f45-build-13168-447/root/chroot_tmpdir/scmroot/gtk-murrine-engine
Cloning into '/var/lib/mock/f45-build-13168-447/root/chroot_tmpdir/scmroot/gtk-murrine-engine'...
$ git fetch origin 056d08a576068e372620439e96b6f1bf6803a325:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk-murrine-engine
 * [new ref]         056d08a576068e372620439e96b6f1bf6803a325 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 056d08a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild