$ git clone -n https://src.fedoraproject.org/rpms/libgphoto2.git /var/lib/mock/f45-build-16283-484/root/chroot_tmpdir/scmroot/libgphoto2
Cloning into '/var/lib/mock/f45-build-16283-484/root/chroot_tmpdir/scmroot/libgphoto2'...
$ git fetch origin dfd8879ed27ea42ba20036b4d20dc8d747f1a0ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgphoto2
 * [new ref]         dfd8879ed27ea42ba20036b4d20dc8d747f1a0ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfd8879 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild