$ git clone -n https://src.fedoraproject.org/rpms/rust-const_format_proc_macros.git /var/lib/mock/f38-build-side-42-init-devel-1394336-31050/root/chroot_tmpdir/scmroot/rust-const_format_proc_macros
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1394336-31050/root/chroot_tmpdir/scmroot/rust-const_format_proc_macros'...
$ git fetch origin f5a47daa114b3635d9c57e9e148e2c7143a64fcb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-const_format_proc_macros
 * [new ref]         f5a47daa114b3635d9c57e9e148e2c7143a64fcb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5a47da Update to version 0.2.31; Fixes RHBZ#2210876