$ git clone -n https://src.fedoraproject.org/rpms/rust-safe-transmute.git /var/lib/mock/f39-build-1915980-42901/root/chroot_tmpdir/scmroot/rust-safe-transmute
Cloning into '/var/lib/mock/f39-build-1915980-42901/root/chroot_tmpdir/scmroot/rust-safe-transmute'...
$ git fetch origin 53ce1df1ea0b60106451de9ef42d816d87677fb4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-safe-transmute
 * [new ref]         53ce1df1ea0b60106451de9ef42d816d87677fb4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53ce1df Convert to %autorelease and %autochangelog