$ git clone -n https://src.fedoraproject.org/rpms/DankMaterialShell.git /var/lib/mock/f45-build-20092-565/root/chroot_tmpdir/scmroot/DankMaterialShell
Cloning into '/var/lib/mock/f45-build-20092-565/root/chroot_tmpdir/scmroot/DankMaterialShell'...
$ git fetch origin 5cd8f1a9fb5852c7d0c7d1b95bfc25aadb9bbda4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/DankMaterialShell
 * [new ref]         5cd8f1a9fb5852c7d0c7d1b95bfc25aadb9bbda4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cd8f1a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild