$ git clone -n https://src.fedoraproject.org/rpms/libldb.git /var/lib/mock/f40-build-741517-110242/root/chroot_tmpdir/scmroot/libldb
Cloning into '/var/lib/mock/f40-build-741517-110242/root/chroot_tmpdir/scmroot/libldb'...
$ git fetch origin de792b453019ef24f26413c814664ca930f0728d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libldb
 * [new ref]         de792b453019ef24f26413c814664ca930f0728d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de792b4 libldb-2.8.0 is available