$ git clone -n https://src.fedoraproject.org/rpms/rust-libcryptsetup-rs.git /var/lib/mock/f42-build-side-1-3569882-46748/root/chroot_tmpdir/scmroot/rust-libcryptsetup-rs
Cloning into '/var/lib/mock/f42-build-side-1-3569882-46748/root/chroot_tmpdir/scmroot/rust-libcryptsetup-rs'...
$ git fetch origin b938375de4a4343ae61037eaf3650c679245eaae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcryptsetup-rs
 * [new ref]         b938375de4a4343ae61037eaf3650c679245eaae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b938375 Convert to %autorelease and %autochangelog