$ git clone -n https://src.fedoraproject.org/rpms/libplasma.git /var/lib/mock/f45-build-16803-491/root/chroot_tmpdir/scmroot/libplasma
Cloning into '/var/lib/mock/f45-build-16803-491/root/chroot_tmpdir/scmroot/libplasma'...
$ git fetch origin 65cec64d4775ddea7169e8abe9a7de9624279e4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libplasma
 * [new ref]         65cec64d4775ddea7169e8abe9a7de9624279e4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65cec64 6.7.5