$ git clone -n https://src.fedoraproject.org/rpms/urjtag.git /var/lib/mock/f41-build-side-2-python-2716800-30560/root/chroot_tmpdir/scmroot/urjtag
Cloning into '/var/lib/mock/f41-build-side-2-python-2716800-30560/root/chroot_tmpdir/scmroot/urjtag'...
$ git fetch origin 5fe6142f8af550253f72b49fa84c0048bd288b74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/urjtag
 * [new ref]         5fe6142f8af550253f72b49fa84c0048bd288b74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fe6142 convert GPLv2+ license to SPDX