$ git clone -n https://src.fedoraproject.org/rpms/python-pytest-regressions.git /var/lib/mock/f38-build-side-42-init-devel-592544-26145/root/chroot_tmpdir/scmroot/python-pytest-regressions
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-592544-26145/root/chroot_tmpdir/scmroot/python-pytest-regressions'...
$ git fetch origin 3c3b53e0409833f06c64097d8f24d22e6e4e4795:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pytest-regressions
 * [new ref]         3c3b53e0409833f06c64097d8f24d22e6e4e4795 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c3b53e Generate extras subpackages.