$ git clone -n https://src.fedoraproject.org/rpms/rust-ripemd.git /var/lib/mock/f45-build-44426-813/root/chroot_tmpdir/scmroot/rust-ripemd
Cloning into '/var/lib/mock/f45-build-44426-813/root/chroot_tmpdir/scmroot/rust-ripemd'...
$ git fetch origin 9ba7d87d1eadef123349744bc29d707232afdc56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ripemd
 * [new ref]         9ba7d87d1eadef123349744bc29d707232afdc56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ba7d87 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild