$ git clone -n https://src.fedoraproject.org/rpms/rust-libheif-sys.git /var/lib/mock/f45-build-42923-797/root/chroot_tmpdir/scmroot/rust-libheif-sys
Cloning into '/var/lib/mock/f45-build-42923-797/root/chroot_tmpdir/scmroot/rust-libheif-sys'...
$ git fetch origin a7dc9ab6467161eb46772a15f56941c9b56474c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libheif-sys
 * [new ref]         a7dc9ab6467161eb46772a15f56941c9b56474c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7dc9ab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild