$ git clone -n https://src.fedoraproject.org/rpms/t1lib.git /var/lib/mock/f40-build-793309-138812/root/chroot_tmpdir/scmroot/t1lib
Cloning into '/var/lib/mock/f40-build-793309-138812/root/chroot_tmpdir/scmroot/t1lib'...
$ git fetch origin 19a2f5d060e0c9a8fc5d07ffdbf3897d375dd4b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/t1lib
 * [new ref]         19a2f5d060e0c9a8fc5d07ffdbf3897d375dd4b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19a2f5d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild