$ git clone -n https://src.fedoraproject.org/rpms/compat-flex.git /var/lib/mock/f40-build-795369-140110/root/chroot_tmpdir/scmroot/compat-flex
Cloning into '/var/lib/mock/f40-build-795369-140110/root/chroot_tmpdir/scmroot/compat-flex'...
$ git fetch origin 3aa10eb42226eae79b807823fc37832c84f1cc24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/compat-flex
 * [new ref]         3aa10eb42226eae79b807823fc37832c84f1cc24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3aa10eb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild