$ git clone -n https://src.fedoraproject.org/rpms/ghc-stm-chans.git /var/lib/mock/f40-build-776206-128705/root/chroot_tmpdir/scmroot/ghc-stm-chans
Cloning into '/var/lib/mock/f40-build-776206-128705/root/chroot_tmpdir/scmroot/ghc-stm-chans'...
$ git fetch origin 091cf182d753eced09c9dea6051d343a0cae0375:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-stm-chans
 * [new ref]         091cf182d753eced09c9dea6051d343a0cae0375 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 091cf18 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild