$ git clone -n https://src.fedoraproject.org/rpms/kmag.git /var/lib/mock/f40-build-2241698-53669/root/chroot_tmpdir/scmroot/kmag
Cloning into '/var/lib/mock/f40-build-2241698-53669/root/chroot_tmpdir/scmroot/kmag'...
$ git fetch origin 75f97f5a697a03d606faed017e4c57289be9a0cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmag
 * [new ref]         75f97f5a697a03d606faed017e4c57289be9a0cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75f97f5 24.01.90