$ git clone -n https://src.fedoraproject.org/rpms/gnome-photos.git /var/lib/mock/f45-build-11465-432/root/chroot_tmpdir/scmroot/gnome-photos
Cloning into '/var/lib/mock/f45-build-11465-432/root/chroot_tmpdir/scmroot/gnome-photos'...
$ git fetch origin 796cd112164901d9e9d51fc1bf20be3a05014c98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-photos
 * [new ref]         796cd112164901d9e9d51fc1bf20be3a05014c98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 796cd11 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild