$ git clone -n https://src.fedoraproject.org/rpms/rust-libheif-rs.git /var/lib/mock/f40-build-2707146-71278/root/chroot_tmpdir/scmroot/rust-libheif-rs
Cloning into '/var/lib/mock/f40-build-2707146-71278/root/chroot_tmpdir/scmroot/rust-libheif-rs'...
$ git fetch origin b9361cfd96cdee267880a0987c69d2cb110fe441:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libheif-rs
 * [new ref]         b9361cfd96cdee267880a0987c69d2cb110fe441 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9361cf Update to version 1.0.0; Fixes RHBZ#2251993