$ git clone -n https://src.fedoraproject.org/rpms/xgrep.git /var/lib/mock/f40-build-759582-120573/root/chroot_tmpdir/scmroot/xgrep
Cloning into '/var/lib/mock/f40-build-759582-120573/root/chroot_tmpdir/scmroot/xgrep'...
$ git fetch origin 67a5d1f3bcdd79179fe74aa88c6b704ab4446d6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xgrep
 * [new ref]         67a5d1f3bcdd79179fe74aa88c6b704ab4446d6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67a5d1f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild