$ git clone -n https://src.fedoraproject.org/rpms/rust-tryfn.git /var/lib/mock/f45-build-45764-827/root/chroot_tmpdir/scmroot/rust-tryfn
Cloning into '/var/lib/mock/f45-build-45764-827/root/chroot_tmpdir/scmroot/rust-tryfn'...
$ git fetch origin 41a511a0a1da3ec8e6559c8ddb412ad9db0b34b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tryfn
 * [new ref]         41a511a0a1da3ec8e6559c8ddb412ad9db0b34b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41a511a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild