$ git clone -n https://src.fedoraproject.org/rpms/vttest.git /var/lib/mock/f45-build-38204-722/root/chroot_tmpdir/scmroot/vttest
Cloning into '/var/lib/mock/f45-build-38204-722/root/chroot_tmpdir/scmroot/vttest'...
$ git fetch origin 5ca94e532a537e41214111d5f0fa85cf8d099715:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vttest
 * [new ref]         5ca94e532a537e41214111d5f0fa85cf8d099715 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5ca94e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild