$ git clone -n https://src.fedoraproject.org/rpms/rust-kdf.git /var/lib/mock/f45-build-42719-796/root/chroot_tmpdir/scmroot/rust-kdf
Cloning into '/var/lib/mock/f45-build-42719-796/root/chroot_tmpdir/scmroot/rust-kdf'...
$ git fetch origin 5129e335653348d228e5d8f841fdd8a1b01262bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-kdf
 * [new ref]         5129e335653348d228e5d8f841fdd8a1b01262bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5129e33 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild