$ git clone -n https://src.fedoraproject.org/rpms/snowball.git /var/lib/mock/f45-build-36195-702/root/chroot_tmpdir/scmroot/snowball
Cloning into '/var/lib/mock/f45-build-36195-702/root/chroot_tmpdir/scmroot/snowball'...
$ git fetch origin be8af54b7a11d8af23448a1bd9203a11b6245b44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snowball
 * [new ref]         be8af54b7a11d8af23448a1bd9203a11b6245b44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be8af54 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild