$ git clone -n https://src.fedoraproject.org/rpms/plymouth-kcm.git /var/lib/mock/f40-build-2511640-61712/root/chroot_tmpdir/scmroot/plymouth-kcm
Cloning into '/var/lib/mock/f40-build-2511640-61712/root/chroot_tmpdir/scmroot/plymouth-kcm'...
$ git fetch origin afc770b4d5cdf4e17a21047be2960e80b9a1d74d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plymouth-kcm
 * [new ref]         afc770b4d5cdf4e17a21047be2960e80b9a1d74d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afc770b 6.0.1