$ git clone -n https://src.fedoraproject.org/rpms/sbsigntools.git /var/lib/mock/f38-build-side-42-init-devel-1284069-30672/root/chroot_tmpdir/scmroot/sbsigntools
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1284069-30672/root/chroot_tmpdir/scmroot/sbsigntools'...
$ git fetch origin 11cdd6f56c94bd9fa114349ad5a28ba246c88b74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sbsigntools
 * [new ref]         11cdd6f56c94bd9fa114349ad5a28ba246c88b74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11cdd6f Merge branch 'f37' into f38