$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f39-build-2309389-57342/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f39-build-2309389-57342/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin 43b6aef386629056ea431bf61c40620132b3a22f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         43b6aef386629056ea431bf61c40620132b3a22f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43b6aef 5.27.10