$ git clone -n https://src.fedoraproject.org/rpms/slashem.git /var/lib/mock/f40-build-1051409-19230/root/chroot_tmpdir/scmroot/slashem
Cloning into '/var/lib/mock/f40-build-1051409-19230/root/chroot_tmpdir/scmroot/slashem'...
$ git fetch origin f7f8f77f07f8a766c1d81c59420396ab8a79f331:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slashem
 * [new ref]         f7f8f77f07f8a766c1d81c59420396ab8a79f331 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7f8f77 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild