$ git clone -n https://src.fedoraproject.org/rpms/rust-linux-loader.git /var/lib/mock/f45-build-43010-799/root/chroot_tmpdir/scmroot/rust-linux-loader
Cloning into '/var/lib/mock/f45-build-43010-799/root/chroot_tmpdir/scmroot/rust-linux-loader'...
$ git fetch origin 2b94c96398e6080efe51c69b49e47e67cde7bc18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-linux-loader
 * [new ref]         2b94c96398e6080efe51c69b49e47e67cde7bc18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b94c96 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild