$ git clone -n https://src.fedoraproject.org/rpms/libzeitgeist.git /var/lib/mock/f45-build-17321-498/root/chroot_tmpdir/scmroot/libzeitgeist
Cloning into '/var/lib/mock/f45-build-17321-498/root/chroot_tmpdir/scmroot/libzeitgeist'...
$ git fetch origin 09b0f9f2bde233a02694c5cd4a22d13e503f4722:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libzeitgeist
 * [new ref]         09b0f9f2bde233a02694c5cd4a22d13e503f4722 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09b0f9f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild