$ git clone -n https://src.fedoraproject.org/rpms/rust-xkeysym.git /var/lib/mock/f45-build-46239-832/root/chroot_tmpdir/scmroot/rust-xkeysym
Cloning into '/var/lib/mock/f45-build-46239-832/root/chroot_tmpdir/scmroot/rust-xkeysym'...
$ git fetch origin 64888e7edba8dcb912e28ef60b8d7e41ef21f291:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-xkeysym
 * [new ref]         64888e7edba8dcb912e28ef60b8d7e41ef21f291 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64888e7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild