$ git clone -n https://src.fedoraproject.org/rpms/bootc.git /var/lib/mock/f41-build-side-1-3132387-39648/root/chroot_tmpdir/scmroot/bootc
Cloning into '/var/lib/mock/f41-build-side-1-3132387-39648/root/chroot_tmpdir/scmroot/bootc'...
$ git fetch origin 126a9271c4fe501c593d303ed8b5d9d9e9f48734:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bootc
 * [new ref]         126a9271c4fe501c593d303ed8b5d9d9e9f48734 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 126a927 Merge remote-tracking branch 'origin/main' into f41