$ git clone -n https://src.fedoraproject.org/rpms/libmongo-client.git /var/lib/mock/f45-build-16607-488/root/chroot_tmpdir/scmroot/libmongo-client
Cloning into '/var/lib/mock/f45-build-16607-488/root/chroot_tmpdir/scmroot/libmongo-client'...
$ git fetch origin 6ae35ff1559b32429a1be12aaa8765254faeae0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmongo-client
 * [new ref]         6ae35ff1559b32429a1be12aaa8765254faeae0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ae35ff Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild