$ git clone -n https://src.fedoraproject.org/rpms/rust-difftastic.git /var/lib/mock/f42-build-3494615-45873/root/chroot_tmpdir/scmroot/rust-difftastic
Cloning into '/var/lib/mock/f42-build-3494615-45873/root/chroot_tmpdir/scmroot/rust-difftastic'...
$ git fetch origin b136d991f4457ed815bba4a591e4fdc4cfd96db8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-difftastic
 * [new ref]         b136d991f4457ed815bba4a591e4fdc4cfd96db8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b136d99 Allow building against strum 0.26, for EPEL 10.0