$ git clone -n https://src.fedoraproject.org/rpms/plymouth-kcm.git /var/lib/mock/f39-build-1503629-34979/root/chroot_tmpdir/scmroot/plymouth-kcm
Cloning into '/var/lib/mock/f39-build-1503629-34979/root/chroot_tmpdir/scmroot/plymouth-kcm'...
$ git fetch origin 6972898296c70715e24fa10b4a88db6fcc42a089:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plymouth-kcm
 * [new ref]         6972898296c70715e24fa10b4a88db6fcc42a089 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6972898 Update to 5.27.8