$ git clone -n https://src.fedoraproject.org/rpms/tcltls.git /var/lib/mock/f42-build-side-1-3589310-46957/root/chroot_tmpdir/scmroot/tcltls
Cloning into '/var/lib/mock/f42-build-side-1-3589310-46957/root/chroot_tmpdir/scmroot/tcltls'...
$ git fetch origin 6ab6d85f208287fa8dd538a4346a33f34d8f6284:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcltls
 * [new ref]         6ab6d85f208287fa8dd538a4346a33f34d8f6284 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ab6d85 Fix loading on tls 9.0 (fixes #2361443)