$ git clone -n https://src.fedoraproject.org/rpms/plasma-oxygen.git /var/lib/mock/f40-build-2113126-50675/root/chroot_tmpdir/scmroot/plasma-oxygen
Cloning into '/var/lib/mock/f40-build-2113126-50675/root/chroot_tmpdir/scmroot/plasma-oxygen'...
$ git fetch origin 9a14d76ad9b660325b77b879318df5a68c53eb31:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-oxygen
 * [new ref]         9a14d76ad9b660325b77b879318df5a68c53eb31 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a14d76 5.91.0