$ git clone -n https://src.fedoraproject.org/rpms/rust-x11rb.git /var/lib/mock/f39-build-1509012-35421/root/chroot_tmpdir/scmroot/rust-x11rb
Cloning into '/var/lib/mock/f39-build-1509012-35421/root/chroot_tmpdir/scmroot/rust-x11rb'...
$ git fetch origin fb21c480aa40ae87228351faf6716156c31cd106:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-x11rb
 * [new ref]         fb21c480aa40ae87228351faf6716156c31cd106 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb21c48 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild