$ git clone -n https://src.fedoraproject.org/rpms/rust-lcms2-sys.git /var/lib/mock/f45-build-42871-797/root/chroot_tmpdir/scmroot/rust-lcms2-sys
Cloning into '/var/lib/mock/f45-build-42871-797/root/chroot_tmpdir/scmroot/rust-lcms2-sys'...
$ git fetch origin 54d7cad8362344e0900c8ee9eaee51d5fd9b17e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lcms2-sys
 * [new ref]         54d7cad8362344e0900c8ee9eaee51d5fd9b17e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54d7cad Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild