$ git clone -n https://src.fedoraproject.org/rpms/rust-calloop.git /var/lib/mock/f40-build-2129702-50787/root/chroot_tmpdir/scmroot/rust-calloop
Cloning into '/var/lib/mock/f40-build-2129702-50787/root/chroot_tmpdir/scmroot/rust-calloop'...
$ git fetch origin 80e7a6d0ff6ce17cd05ef98283cd09ea95672ea8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-calloop
 * [new ref]         80e7a6d0ff6ce17cd05ef98283cd09ea95672ea8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80e7a6d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild