$ git clone -n https://src.fedoraproject.org/rpms/libplasma.git /var/lib/mock/f41-build-side-1-3002892-36598/root/chroot_tmpdir/scmroot/libplasma
Cloning into '/var/lib/mock/f41-build-side-1-3002892-36598/root/chroot_tmpdir/scmroot/libplasma'...
$ git fetch origin fee7f7f1f19ab1c6ca302b1b02ee2e185a310e00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libplasma
 * [new ref]         fee7f7f1f19ab1c6ca302b1b02ee2e185a310e00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fee7f7f 6.2.1