$ git clone -n https://src.fedoraproject.org/rpms/libdnf.git /var/lib/mock/f42-build-side-1-3502913-45979/root/chroot_tmpdir/scmroot/libdnf
Cloning into '/var/lib/mock/f42-build-side-1-3502913-45979/root/chroot_tmpdir/scmroot/libdnf'...
$ git fetch origin c11c2f92c0771bcb5ff98d14e606996d82295338:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdnf
 * [new ref]         c11c2f92c0771bcb5ff98d14e606996d82295338 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c11c2f9 Update to 0.74.0