$ git clone -n https://src.fedoraproject.org/rpms/rust-heck0.4.git /var/lib/mock/f45-build-42295-792/root/chroot_tmpdir/scmroot/rust-heck0.4
Cloning into '/var/lib/mock/f45-build-42295-792/root/chroot_tmpdir/scmroot/rust-heck0.4'...
$ git fetch origin 5aa83b5fd1d7859d7976a5cb0b1204a797f1e956:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-heck0.4
 * [new ref]         5aa83b5fd1d7859d7976a5cb0b1204a797f1e956 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5aa83b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild