$ git clone -n https://src.fedoraproject.org/rpms/g3kb-switch.git /var/lib/mock/f42-build-3291639-41426/root/chroot_tmpdir/scmroot/g3kb-switch
Cloning into '/var/lib/mock/f42-build-3291639-41426/root/chroot_tmpdir/scmroot/g3kb-switch'...
$ git fetch origin af790dca4d30f87de3d6777ba179085200d9c2c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g3kb-switch
 * [new ref]         af790dca4d30f87de3d6777ba179085200d9c2c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af790dc Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild