$ git clone -n https://src.fedoraproject.org/rpms/rxvt-unicode.git /var/lib/mock/f40-build-2233312-53371/root/chroot_tmpdir/scmroot/rxvt-unicode
Cloning into '/var/lib/mock/f40-build-2233312-53371/root/chroot_tmpdir/scmroot/rxvt-unicode'...
$ git fetch origin 27872c940ed0abd22fd624967bea922a1ea8871b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rxvt-unicode
 * [new ref]         27872c940ed0abd22fd624967bea922a1ea8871b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27872c9 Convert License tag to SPDX expression