$ git clone -n https://src.fedoraproject.org/rpms/rust-git-delta.git /var/lib/mock/f41-build-1099164-20020/root/chroot_tmpdir/scmroot/rust-git-delta
Cloning into '/var/lib/mock/f41-build-1099164-20020/root/chroot_tmpdir/scmroot/rust-git-delta'...
$ git fetch origin 37422c7673c33760e9fd445b8189bc78a7628530:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-git-delta
 * [new ref]         37422c7673c33760e9fd445b8189bc78a7628530 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 37422c7 Update to version 0.17.0; Fixes RHBZ#2269808