$ git clone -n https://src.fedoraproject.org/rpms/rust-regex-automata.git /var/lib/mock/f38-build-side-42-init-devel-1146073-30457/root/chroot_tmpdir/scmroot/rust-regex-automata
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1146073-30457/root/chroot_tmpdir/scmroot/rust-regex-automata'...
$ git fetch origin f4ba9ae1e1e45d4b911a0e30ef1558b26bd0a97e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-regex-automata
 * [new ref]         f4ba9ae1e1e45d4b911a0e30ef1558b26bd0a97e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4ba9ae Update to version 0.3.4; Fixes RHBZ#2227385