$ git clone -n https://src.fedoraproject.org/rpms/rust-imara-diff.git /var/lib/mock/f41-build-side-1-2992581-36014/root/chroot_tmpdir/scmroot/rust-imara-diff
Cloning into '/var/lib/mock/f41-build-side-1-2992581-36014/root/chroot_tmpdir/scmroot/rust-imara-diff'...
$ git fetch origin ca77605241bb670f7a0640fc057271efb77c362b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-imara-diff
 * [new ref]         ca77605241bb670f7a0640fc057271efb77c362b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca77605 Update to version 0.1.7; Fixes RHBZ#2300049