$ git clone -n https://src.fedoraproject.org/rpms/rust-git-delta.git /var/lib/mock/f45-build-41897-786/root/chroot_tmpdir/scmroot/rust-git-delta
Cloning into '/var/lib/mock/f45-build-41897-786/root/chroot_tmpdir/scmroot/rust-git-delta'...
$ git fetch origin 74faeea43e952bcbdfbb45785c32cc316429a8d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-git-delta
 * [new ref]         74faeea43e952bcbdfbb45785c32cc316429a8d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74faeea Rebuild with latest libgit2-sys crate for libgit2 fixes