$ git clone -n https://src.fedoraproject.org/rpms/mcpp.git /var/lib/mock/f41-build-857508-168121/root/chroot_tmpdir/scmroot/mcpp
Cloning into '/var/lib/mock/f41-build-857508-168121/root/chroot_tmpdir/scmroot/mcpp'...
$ git fetch origin 3d4e1a9e10efc2a285db71b7bc45ae3cbdbce7d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mcpp
 * [new ref]         3d4e1a9e10efc2a285db71b7bc45ae3cbdbce7d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d4e1a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild