$ git clone -n https://src.fedoraproject.org/rpms/rust-fxhash.git /var/lib/mock/f45-build-41777-785/root/chroot_tmpdir/scmroot/rust-fxhash
Cloning into '/var/lib/mock/f45-build-41777-785/root/chroot_tmpdir/scmroot/rust-fxhash'...
$ git fetch origin cd5a0da7b8a6e9797ec24aaa0e31132146758321:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fxhash
 * [new ref]         cd5a0da7b8a6e9797ec24aaa0e31132146758321 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd5a0da Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild