$ git clone -n https://src.fedoraproject.org/rpms/rust-hash32_0.2.git /var/lib/mock/f45-build-42309-792/root/chroot_tmpdir/scmroot/rust-hash32_0.2
Cloning into '/var/lib/mock/f45-build-42309-792/root/chroot_tmpdir/scmroot/rust-hash32_0.2'...
$ git fetch origin f5d059ccdc9eaad53443f6affa5da1b97cf0aa21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hash32_0.2
 * [new ref]         f5d059ccdc9eaad53443f6affa5da1b97cf0aa21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5d059c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild