$ git clone -n https://src.fedoraproject.org/rpms/xconvers.git /var/lib/mock/f40-build-788512-135185/root/chroot_tmpdir/scmroot/xconvers
Cloning into '/var/lib/mock/f40-build-788512-135185/root/chroot_tmpdir/scmroot/xconvers'...
$ git fetch origin 308e9e86781d96891975d8503d5b0493de3b0a0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xconvers
 * [new ref]         308e9e86781d96891975d8503d5b0493de3b0a0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 308e9e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild