$ git clone -n https://src.fedoraproject.org/rpms/rust-dary_heap.git /var/lib/mock/f45-build-41206-780/root/chroot_tmpdir/scmroot/rust-dary_heap
Cloning into '/var/lib/mock/f45-build-41206-780/root/chroot_tmpdir/scmroot/rust-dary_heap'...
$ git fetch origin 3dc976fe7792607803ae32a273970e9b896267b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dary_heap
 * [new ref]         3dc976fe7792607803ae32a273970e9b896267b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dc976f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild