$ git clone -n https://src.fedoraproject.org/rpms/rust-headers0.3.git /var/lib/mock/f45-build-42310-792/root/chroot_tmpdir/scmroot/rust-headers0.3
Cloning into '/var/lib/mock/f45-build-42310-792/root/chroot_tmpdir/scmroot/rust-headers0.3'...
$ git fetch origin 9140a33917f032c696740c1805d369b8727b850e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-headers0.3
 * [new ref]         9140a33917f032c696740c1805d369b8727b850e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9140a33 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild