$ git clone -n https://src.fedoraproject.org/rpms/butt.git /var/lib/mock/f42-build-3284999-41411/root/chroot_tmpdir/scmroot/butt
Cloning into '/var/lib/mock/f42-build-3284999-41411/root/chroot_tmpdir/scmroot/butt'...
$ git fetch origin 10a4536ffb058e3756cdf320902eeb13ebe812a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/butt
 * [new ref]         10a4536ffb058e3756cdf320902eeb13ebe812a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10a4536 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild