$ git clone -n https://src.fedoraproject.org/rpms/rust-phf.git /var/lib/mock/f45-build-43821-807/root/chroot_tmpdir/scmroot/rust-phf
Cloning into '/var/lib/mock/f45-build-43821-807/root/chroot_tmpdir/scmroot/rust-phf'...
$ git fetch origin 76a4e1c89026ea46b7f7d38d786d5f10005ab0ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-phf
 * [new ref]         76a4e1c89026ea46b7f7d38d786d5f10005ab0ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 76a4e1c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild