$ git clone -n https://src.fedoraproject.org/rpms/cppmyth.git /var/lib/mock/f40-build-789852-136078/root/chroot_tmpdir/scmroot/cppmyth
Cloning into '/var/lib/mock/f40-build-789852-136078/root/chroot_tmpdir/scmroot/cppmyth'...
$ git fetch origin 41a8d6119a52de6db0b3d95d82368e5c3e5d1406:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cppmyth
 * [new ref]         41a8d6119a52de6db0b3d95d82368e5c3e5d1406 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41a8d61 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild