$ git clone -n https://src.fedoraproject.org/rpms/rust-lexopt.git /var/lib/mock/f45-build-42876-797/root/chroot_tmpdir/scmroot/rust-lexopt
Cloning into '/var/lib/mock/f45-build-42876-797/root/chroot_tmpdir/scmroot/rust-lexopt'...
$ git fetch origin f6691665fb68a1543ef4a32eb2c727d55f280ab4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lexopt
 * [new ref]         f6691665fb68a1543ef4a32eb2c727d55f280ab4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f669166 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild