$ git clone -n https://src.fedoraproject.org/rpms/rust-arg_enum_proc_macro.git /var/lib/mock/f45-build-40114-768/root/chroot_tmpdir/scmroot/rust-arg_enum_proc_macro
Cloning into '/var/lib/mock/f45-build-40114-768/root/chroot_tmpdir/scmroot/rust-arg_enum_proc_macro'...
$ git fetch origin cb209c89bdb8e7ac7bf9a86cce7dcd1fcbc66230:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-arg_enum_proc_macro
 * [new ref]         cb209c89bdb8e7ac7bf9a86cce7dcd1fcbc66230 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb209c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild