$ git clone -n https://src.fedoraproject.org/rpms/python-specfile.git /var/lib/mock/f40-build-2269308-54765/root/chroot_tmpdir/scmroot/python-specfile
Cloning into '/var/lib/mock/f40-build-2269308-54765/root/chroot_tmpdir/scmroot/python-specfile'...
$ git fetch origin b208824aae3f4213ea13c87f7836ead1c7f5315e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-specfile
 * [new ref]         b208824aae3f4213ea13c87f7836ead1c7f5315e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b208824 [packit] 0.27.0 upstream release