$ git clone -n https://src.fedoraproject.org/rpms/buildah.git /var/lib/mock/f39-build-1540596-36476/root/chroot_tmpdir/scmroot/buildah
Cloning into '/var/lib/mock/f39-build-1540596-36476/root/chroot_tmpdir/scmroot/buildah'...
$ git fetch origin 7c5b10b0f44d0109c8f637022e2c9756296a2c58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/buildah
 * [new ref]         7c5b10b0f44d0109c8f637022e2c9756296a2c58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c5b10b [packit] 1.32.2 upstream release