$ git clone -n https://src.fedoraproject.org/rpms/m17n-lib.git /var/lib/mock/f40-build-788388-135139/root/chroot_tmpdir/scmroot/m17n-lib
Cloning into '/var/lib/mock/f40-build-788388-135139/root/chroot_tmpdir/scmroot/m17n-lib'...
$ git fetch origin b750709b2aca90f4f1d504077fc11e64d8514d83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m17n-lib
 * [new ref]         b750709b2aca90f4f1d504077fc11e64d8514d83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b750709 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild