$ git clone -n https://src.fedoraproject.org/rpms/shutter.git /var/lib/mock/f45-build-35957-700/root/chroot_tmpdir/scmroot/shutter
Cloning into '/var/lib/mock/f45-build-35957-700/root/chroot_tmpdir/scmroot/shutter'...
$ git fetch origin 28025182bf054bce59a5c647de1c9e70d0666e98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shutter
 * [new ref]         28025182bf054bce59a5c647de1c9e70d0666e98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2802518 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild