$ git clone -n https://src.fedoraproject.org/rpms/rust-scanlex.git /var/lib/mock/f45-build-44664-816/root/chroot_tmpdir/scmroot/rust-scanlex
Cloning into '/var/lib/mock/f45-build-44664-816/root/chroot_tmpdir/scmroot/rust-scanlex'...
$ git fetch origin 09a5a86486354a8cc8cac96d7c377bf4183d3052:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scanlex
 * [new ref]         09a5a86486354a8cc8cac96d7c377bf4183d3052 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09a5a86 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild