$ git clone -n https://src.fedoraproject.org/rpms/rust-afterburn.git /var/lib/mock/f41-build-side-1-2803267-32817/root/chroot_tmpdir/scmroot/rust-afterburn
Cloning into '/var/lib/mock/f41-build-side-1-2803267-32817/root/chroot_tmpdir/scmroot/rust-afterburn'...
$ git fetch origin 42cf88419a4bfba6965769661aa7ed24520b80a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-afterburn
 * [new ref]         42cf88419a4bfba6965769661aa7ed24520b80a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42cf884 Fix ELN build