$ git clone -n https://src.fedoraproject.org/rpms/rust-kvm-ioctls.git /var/lib/mock/f41-build-side-1-3137349-39794/root/chroot_tmpdir/scmroot/rust-kvm-ioctls
Cloning into '/var/lib/mock/f41-build-side-1-3137349-39794/root/chroot_tmpdir/scmroot/rust-kvm-ioctls'...
$ git fetch origin 298affe4b90599acd60e81d1d49da5407672d717:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-kvm-ioctls
 * [new ref]         298affe4b90599acd60e81d1d49da5407672d717 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 298affe Update to version 0.19.0; Fixes RHBZ#2321256