$ git clone -n https://src.fedoraproject.org/rpms/retext.git /var/lib/mock/f41-build-side-2-python-2699848-30377/root/chroot_tmpdir/scmroot/retext
Cloning into '/var/lib/mock/f41-build-side-2-python-2699848-30377/root/chroot_tmpdir/scmroot/retext'...
$ git fetch origin 471fc98d803492b8a31cb32920b43c6d299c9653:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/retext
 * [new ref]         471fc98d803492b8a31cb32920b43c6d299c9653 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 471fc98 convert GPLv3+ license to SPDX