$ git clone -n https://src.fedoraproject.org/rpms/rxvt-unicode.git /var/lib/mock/f39-build-1460124-33183/root/chroot_tmpdir/scmroot/rxvt-unicode
Cloning into '/var/lib/mock/f39-build-1460124-33183/root/chroot_tmpdir/scmroot/rxvt-unicode'...
$ git fetch origin 835b14af6d7ae590961c18d9ad3256a6b7ee0bda:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rxvt-unicode
 * [new ref]         835b14af6d7ae590961c18d9ad3256a6b7ee0bda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 835b14a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild