$ git clone -n https://src.fedoraproject.org/rpms/rust-cool_asserts.git /var/lib/mock/f45-build-40970-778/root/chroot_tmpdir/scmroot/rust-cool_asserts
Cloning into '/var/lib/mock/f45-build-40970-778/root/chroot_tmpdir/scmroot/rust-cool_asserts'...
$ git fetch origin 00c5c178316c9920dda73b144ea6c7e6c73d98c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cool_asserts
 * [new ref]         00c5c178316c9920dda73b144ea6c7e6c73d98c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00c5c17 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild