$ git clone -n https://src.fedoraproject.org/rpms/rust-getset.git /var/lib/mock/f45-build-41851-786/root/chroot_tmpdir/scmroot/rust-getset
Cloning into '/var/lib/mock/f45-build-41851-786/root/chroot_tmpdir/scmroot/rust-getset'...
$ git fetch origin 68675e4a8980001b15d3aaa0c031d4ee2b321e44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-getset
 * [new ref]         68675e4a8980001b15d3aaa0c031d4ee2b321e44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68675e4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild