$ git clone -n https://src.fedoraproject.org/rpms/golang-github-lestrrat-jwx.git /var/lib/mock/f39-build-1727001-41240/root/chroot_tmpdir/scmroot/golang-github-lestrrat-jwx
Cloning into '/var/lib/mock/f39-build-1727001-41240/root/chroot_tmpdir/scmroot/golang-github-lestrrat-jwx'...
$ git fetch origin c5f8f120ccda61072283ed565a5501ddbd8c5aa0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-lestrrat-jwx
 * [new ref]         c5f8f120ccda61072283ed565a5501ddbd8c5aa0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5f8f12 Initial import