$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f40-build-1508976-23893/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f40-build-1508976-23893/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin 23814fd4c57d1abcac923958f231bb45a0caf5ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         23814fd4c57d1abcac923958f231bb45a0caf5ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23814fd 6.1.2