$ git clone -n https://src.fedoraproject.org/rpms/rust-byteorder.git /var/lib/mock/f45-build-40549-773/root/chroot_tmpdir/scmroot/rust-byteorder
Cloning into '/var/lib/mock/f45-build-40549-773/root/chroot_tmpdir/scmroot/rust-byteorder'...
$ git fetch origin ac10db29115a4de947bd56872d076029f8bfd04b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-byteorder
 * [new ref]         ac10db29115a4de947bd56872d076029f8bfd04b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac10db2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild