$ git clone -n https://src.fedoraproject.org/rpms/tagtool.git /var/lib/mock/f41-build-side-1-2670495-29058/root/chroot_tmpdir/scmroot/tagtool
Cloning into '/var/lib/mock/f41-build-side-1-2670495-29058/root/chroot_tmpdir/scmroot/tagtool'...
$ git fetch origin c151a0c30b225fbdf61249c387fc7bffbc1411fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tagtool
 * [new ref]         c151a0c30b225fbdf61249c387fc7bffbc1411fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c151a0c convert GPLv2 license to SPDX