$ git clone -n https://src.fedoraproject.org/rpms/plasma-milou.git /var/lib/mock/f39-build-1629420-39547/root/chroot_tmpdir/scmroot/plasma-milou
Cloning into '/var/lib/mock/f39-build-1629420-39547/root/chroot_tmpdir/scmroot/plasma-milou'...
$ git fetch origin 4af8db60a4b1b32fd2416089ece48169ea1a3cb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-milou
 * [new ref]         4af8db60a4b1b32fd2416089ece48169ea1a3cb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4af8db6 5.27.9