$ git clone -n https://src.fedoraproject.org/rpms/sombok.git /var/lib/mock/f45-build-36211-702/root/chroot_tmpdir/scmroot/sombok
Cloning into '/var/lib/mock/f45-build-36211-702/root/chroot_tmpdir/scmroot/sombok'...
$ git fetch origin 8a49640ac9673d48e75d512623827af8ee2f4bd9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sombok
 * [new ref]         8a49640ac9673d48e75d512623827af8ee2f4bd9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a49640 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild